1. Bahndari, A.K., Luthar, I.S.: Torsion units of integral group rings of metacyclic groups. J. Number Theory 17, 170–183 (1983)
2. Berman, S.D.: On the equation $$x^n=1$$ in an integral group ring. Ukrain. Math. Zh. 7, 253–261 (1955)
3. Bist, V.: The structure of unit groups of group rings. Ph.D. thesis (1990)
4. Bist, V.: Unit groups of integral group rings. Proc. Am. Math. Soc. 120, 13–17 (1994)
5. Bovdi, A.A.: Structure of an integral group ring with trivial elements of finite order. Sibirsk. Mat. Zh. 21, 28–37, 235 (1980) (Russian)